// 实现这个项目的构建任务
const { src, dest, parallel, series, watch } = require('gulp')
var sass = require('gulp-sass');/*sass编译*/
var cleanCSS = require('gulp-clean-css');/*css压缩*/
var rename = require('gulp-rename');/*文件重命名*/
var babel = require('gulp-babel');/*To ECMAScript 2015*/
var uglify = require("gulp-uglify");/*js压缩*/
var gUtil = require("gulp-util");/*打印错误日志*/
const browserSync = require('browser-sync')
const loadPlugins = require('gulp-load-plugins')
const imagemin = require('gulp-imagemin');
const htmlmin = require('gulp-htmlmin');
const swig = require('gulp-swig');
const plugins = loadPlugins()
const del = require('del')
console.log('plugins :>> ', plugins);
const bs = browserSync.create()
const data = {
    menus: [
        {
        name: 'Home',
        icon: 'aperture',
        link: 'index.html'
        },
        {
        name: 'Features',
        link: 'features.html'
        },
        {
        name: 'About',
        link: 'about.html'
        },
        {
        name: 'Contact',
        link: '#',
        children: [
            {
            name: 'Twitter',
            link: 'https://twitter.com/w_zce'
            },
            {
            name: 'About',
            link: 'https://weibo.com/zceme'
            },
            {
            name: 'divider'
            },
            {
            name: 'About',
            link: 'https://github.com/zce'
            }
        ]
        }
    ],
    pkg: require('./package.json'),
    date: new Date()
}
const clean = () => {
    return del(['dist', 'temp'])
}
const style = () => {
    return src('src/assets/styles/*.scss', { base: 'src' })
        .pipe(sass({
            sourceMap: true
        }))
        .pipe(cleanCSS())
        // .pipe(rename({suffix: '.min'}))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }))
}
const script = () => {
    return src('src/assets/scripts/*.js', { base: 'src' })
        .pipe(plugins.babel({ presets: ['@babel/preset-env'] }))
        .pipe(uglify({
            mangle: false,//类型：Boolean 默认：true 是否修改变量名
            compress: true,//类型：Boolean 默认：true 是否完全压缩
        }))
        // .pipe(rename({suffix: '.min'}))
        .on('error', function (err) {
            gUtil.log(gUtil.colors.red('[Error]'), err.toString());
        })
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }))
}
const page = () => {
    return src('src/*.html', { base: 'src' })
        .pipe(plugins.swig({ data, defaults: { cache: false } })) // 防止模板缓存导致页面不能及时更新
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }))
}
const image = () => {
    return src('src/assets/images/**', { base: 'src' })
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))
}
const font = () => {
    return src('src/assets/fonts/**', { base: 'src' })
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))
}

const extra = () => {
    return src('public/**', { base: 'public' })
        .pipe(dest('dist'))
}

const serve = () => {
    watch('src/assets/styles/*.scss', style)
    watch('src/assets/scripts/*.js', script)
    watch('src/*.html', page)
    // watch('src/assets/images/**', image)
    // watch('src/assets/fonts/**', font)
    // watch('public/**', extra)
    watch([
        'src/assets/images/**',
        'src/assets/fonts/**',
        'public/**'
    ], bs.reload)
    bs.init({
        notify: false,
        port: 2080,
        // open: false,
        // files: 'dist/**',
        server: {
        baseDir: ['temp', 'src', 'public'],
        routes: {
            '/node_modules': 'node_modules'
        }
        }
    })
}
const useref = () => {
    return src('temp/*.html', { base: 'temp' })
        .pipe(plugins.useref({ searchPath: ['temp', '.'] }))
        // html js css
        .pipe(plugins.if(/\.js$/, plugins.uglify()))
        .pipe(plugins.if(/\.css$/, plugins.cleanCss()))
        .pipe(plugins.if(/\.html$/, plugins.htmlmin({
            collapseWhitespace: true,
            minifyCSS: true,
            minifyJS: true
        })))
        .pipe(dest('dist'))
}
const compile = parallel(style, script, page)
// 上线之前执行的任务
const build =  series(
    clean,
    parallel(
        series(compile, useref),
        image,
        font,
        extra
    )
)
const develop = series(compile, serve)
module.exports = {
    clean,
    build,
    develop
}